Re-land: cc: Add raster finished signals to RasterWorkerPool.

cc/resources/raster_worker_pool_perftest.cc

Index: cc/resources/raster_worker_pool_perftest.cc
diff --git a/cc/resources/raster_worker_pool_perftest.cc b/cc/resources/raster_worker_pool_perftest.cc
index 44cc2c90bcf721ef8db80ea527037eec09dcc691..7e3b41687101005353c52c1462fd16147303e8a7 100644
--- a/cc/resources/raster_worker_pool_perftest.cc
+++ b/cc/resources/raster_worker_pool_perftest.cc
@@ -38,6 +38,12 @@ class PerfRasterWorkerPool : public RasterWorkerPool {
   virtual void ScheduleTasks(RasterTask::Queue* queue) OVERRIDE {
     NOTREACHED();
   }
+  virtual void OnRasterTasksFinished() OVERRIDE {
+    NOTREACHED();
+  }
+  virtual void OnRasterTasksRequiredForActivationFinished() OVERRIDE {
+    NOTREACHED();
+  }
 
   void SetRasterTasks(RasterTask::Queue* queue) {
     RasterWorkerPool::SetRasterTasks(queue);
@@ -66,7 +72,9 @@ class PerfRasterWorkerPool : public RasterWorkerPool {
       DCHECK(perf_it != perf_tasks_.end());
       if (perf_it != perf_tasks_.end()) {
         internal::WorkerPoolTask* perf_task = perf_it->second.get();
-        graph.InsertRasterTask(perf_task, task->dependencies());
+        graph.InsertRasterTask(perf_task,
+                               task->dependencies(),
+                               IsRasterTaskRequiredForActivation(task));
       }
     }
   }